Year	per 1,000 uninfected population ages 15-49
1990	2.6
1991	2.8
1992	2.9
1993	3
1994	2.7
1995	2.4
1996	2.1
1997	1.8
1998	1.7
1999	1.6
2000	1.4
2001	1.3
2002	1.2
2003	1.1
2004	1
2005	1
2006	1
2007	0.9
2008	0.9
2009	1
2010	1
2011	1
2012	1
2013	1
2014	1.1
2015	1.1
2016	1.2
2017	1.2
2018	1.3